Vol. 6, Issue 2, Part D (2024)

Marine-derived nanotechnology offers a sustainable and eco-friendly approach to nanoparticle synthesis, leveraging the rich bioactive potential of marine organisms. This study focuses on the biosynthesis of silver nanoparticles (AgNPs) using the brown alga Colpomenia peregrina as a reducing and stabilizing agent. The synthesized nanoparticles were characterized using UV-Vis spectroscopy, Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and Transmission electron microscopy (TEM) to confirm their formation, structural integrity, and morphology.
The antioxidant activity of the AgNPs was evaluated through in vitro assays, including DPPH free radical scavenging and ABTS radical cation decolorization. Results revealed significant antioxidant potential, with IC₅₀ values indicating dose-dependent activity comparable to standard antioxidants. The biosynthesized AgNPs exhibited enhanced stability and bioactivity, attributed to the phytochemical constituents of C. peregrina.
This study highlights the potential of Colpomenia peregrina-synthesized silver nanoparticles as a promising candidate for biomedical and environmental applications, paving the way for sustainable nanotechnology innovations.